chinwag-android/app/src/main/java/com/keylesspalace/tusky/TimelineFragment.java

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/* Copyright 2017 Andrew Dawson
*
* This file is part of Tusky.
*
* Tusky is free software: you can redistribute it and/or modify it under the terms of the GNU
* General Public License as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along with Tusky. If not, see
* <http://www.gnu.org/licenses/>. */
package com.keylesspalace.tusky;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.content.ContextCompat;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import org.json.JSONArray;
import org.json.JSONException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class TimelineFragment extends SFragment implements
SwipeRefreshLayout.OnRefreshListener, StatusActionListener, FooterActionListener {
private static final String TAG = "Timeline"; // logging tag
private static final int EXPECTED_STATUSES_FETCHED = 20;
public enum Kind {
HOME,
MENTIONS,
PUBLIC,
TAG,
USER,
}
private SwipeRefreshLayout swipeRefreshLayout;
private RecyclerView recyclerView;
private TimelineAdapter adapter;
private Kind kind;
private String hashtagOrId;
private LinearLayoutManager layoutManager;
private EndlessOnScrollListener scrollListener;
private TabLayout.OnTabSelectedListener onTabSelectedListener;
public static TimelineFragment newInstance(Kind kind) {
TimelineFragment fragment = new TimelineFragment();
Bundle arguments = new Bundle();
arguments.putString("kind", kind.name());
fragment.setArguments(arguments);
return fragment;
}
public static TimelineFragment newInstance(Kind kind, String hashtagOrId) {
TimelineFragment fragment = new TimelineFragment();
Bundle arguments = new Bundle();
arguments.putString("kind", kind.name());
arguments.putString("hashtag_or_id", hashtagOrId);
fragment.setArguments(arguments);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Bundle arguments = getArguments();
kind = Kind.valueOf(arguments.getString("kind"));
if (kind == Kind.TAG || kind == Kind.USER) {
hashtagOrId = arguments.getString("hashtag_or_id");
}
View rootView = inflater.inflate(R.layout.fragment_timeline, container, false);
// Setup the SwipeRefreshLayout.
Context context = getContext();
swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipe_refresh_layout);
swipeRefreshLayout.setOnRefreshListener(this);
// Setup the RecyclerView.
recyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(context);
recyclerView.setLayoutManager(layoutManager);
DividerItemDecoration divider = new DividerItemDecoration(
context, layoutManager.getOrientation());
Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider);
divider.setDrawable(drawable);
recyclerView.addItemDecoration(divider);
scrollListener = new EndlessOnScrollListener(layoutManager) {
@Override
public void onLoadMore(int page, int totalItemsCount, RecyclerView view) {
TimelineAdapter adapter = (TimelineAdapter) view.getAdapter();
Status status = adapter.getItem(adapter.getItemCount() - 2);
if (status != null) {
sendFetchTimelineRequest(status.getId());
} else {
sendFetchTimelineRequest();
}
}
};
recyclerView.addOnScrollListener(scrollListener);
adapter = new TimelineAdapter(this, this);
recyclerView.setAdapter(adapter);
if (jumpToTopAllowed()) {
TabLayout layout = (TabLayout) getActivity().findViewById(R.id.tab_layout);
onTabSelectedListener = new TabLayout.OnTabSelectedListener() {
@Override
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public void onTabSelected(TabLayout.Tab tab) {}
@Override
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public void onTabUnselected(TabLayout.Tab tab) {}
@Override
public void onTabReselected(TabLayout.Tab tab) {
jumpToTop();
}
};
layout.addOnTabSelectedListener(onTabSelectedListener);
}
sendFetchTimelineRequest();
return rootView;
}
@Override
public void onDestroyView() {
if (jumpToTopAllowed()) {
TabLayout tabLayout = (TabLayout) getActivity().findViewById(R.id.tab_layout);
tabLayout.removeOnTabSelectedListener(onTabSelectedListener);
}
super.onDestroyView();
}
private boolean jumpToTopAllowed() {
return kind != Kind.TAG;
}
private void jumpToTop() {
layoutManager.scrollToPosition(0);
scrollListener.reset();
}
private void sendFetchTimelineRequest(final String fromId) {
String endpoint;
switch (kind) {
default:
case HOME: {
endpoint = getString(R.string.endpoint_timelines_home);
break;
}
case MENTIONS: {
endpoint = getString(R.string.endpoint_timelines_mentions);
break;
}
case PUBLIC: {
endpoint = getString(R.string.endpoint_timelines_public);
break;
}
case TAG: {
endpoint = String.format(getString(R.string.endpoint_timelines_tag), hashtagOrId);
break;
}
case USER: {
endpoint = String.format(getString(R.string.endpoint_statuses), hashtagOrId);
break;
}
}
String url = "https://" + domain + endpoint;
if (fromId != null) {
url += "?max_id=" + fromId;
}
JsonArrayRequest request = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
List<Status> statuses = null;
try {
statuses = Status.parse(response);
} catch (JSONException e) {
onFetchTimelineFailure(e);
}
if (statuses != null) {
onFetchTimelineSuccess(statuses, fromId != null);
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
onFetchTimelineFailure(error);
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<>();
headers.put("Authorization", "Bearer " + accessToken);
return headers;
}
};
VolleySingleton.getInstance(getContext()).addToRequestQueue(request);
}
private void sendFetchTimelineRequest() {
sendFetchTimelineRequest(null);
}
public void onFetchTimelineSuccess(List<Status> statuses, boolean added) {
if (added) {
adapter.addItems(statuses);
} else {
adapter.update(statuses);
}
if (statuses.size() >= EXPECTED_STATUSES_FETCHED) {
setFetchTimelineState(FooterViewHolder.State.LOADING);
} else {
setFetchTimelineState(FooterViewHolder.State.END_OF_TIMELINE);
}
swipeRefreshLayout.setRefreshing(false);
}
public void onFetchTimelineFailure(Exception exception) {
setFetchTimelineState(FooterViewHolder.State.RETRY);
swipeRefreshLayout.setRefreshing(false);
Log.e(TAG, "Fetch Failure: " + exception.getMessage());
}
private void setFetchTimelineState(FooterViewHolder.State state) {
RecyclerView.ViewHolder viewHolder =
recyclerView.findViewHolderForAdapterPosition(adapter.getItemCount() - 1);
if (viewHolder != null) {
FooterViewHolder holder = (FooterViewHolder) viewHolder;
holder.setState(state);
}
}
public void onRefresh() {
sendFetchTimelineRequest();
}
public void onLoadMore() {
Status status = adapter.getItem(adapter.getItemCount() - 2);
if (status != null) {
sendFetchTimelineRequest(status.getId());
} else {
sendFetchTimelineRequest();
}
}
public void onReply(int position) {
super.reply(adapter.getItem(position));
}
public void onReblog(final boolean reblog, final int position) {
super.reblog(adapter.getItem(position), reblog, adapter, position);
}
public void onFavourite(final boolean favourite, final int position) {
super.favourite(adapter.getItem(position), favourite, adapter, position);
}
public void onMore(View view, final int position) {
super.more(adapter.getItem(position), view, adapter, position);
}
public void onViewMedia(String url, Status.MediaAttachment.Type type) {
super.viewMedia(url, type);
}
public void onViewThread(int position) {
super.viewThread(adapter.getItem(position));
}
public void onViewTag(String tag) {
super.viewTag(tag);
}
public void onViewAccount(String id, String username) {
super.viewAccount(id, username);
}
public void onViewAccount(int position) {
Status status = adapter.getItem(position);
String id = status.getAccountId();
String username = status.getUsername();
super.viewAccount(id, username);
}
}